戻る
Rotational speed means how many revolutions the tool makes in one minute.
In the machining program that moves the machine tool, it is expressed by "S". In calculations, "n" may also be used. The unit is (min⁻¹). Example: S2000 → 2000 revolutions in 1 minute
The expression of the speed of rotation is different from the rotational speed (S) and is called the cutting speed (Vc). Cutting speed (Vc) is a unit of how many meters the circumference of a tool moves in one minute.
The rotational speed (S) and the cutting speed (Vc) can be converted to each other.
n: Rotational speed Vc: Cutting speed π: Pi 3.14 Dc: Tool diameter
Example of rotation speed 1
 |
 |
・ If it is 100 revolutions per minute, the rotation speed is the same between φ20 and φ10.
n = 100 (min⁻¹) for φ20 drills
n=100 (min⁻¹) of φ10 drill
If the cutting speed is the same (1 m/min), the φ10 drill will rotate more than the φ20 drill.
n = 16 (min⁻¹) of a φ20 drill at Vc=1 (m/min)
n = 32 (min⁻¹) for φ10 drills at Vc=1 (m/min)